Activity
Purple Math

Purplemath: Factoring Numbers

For Students 3rd - 8th Standards
Visit Purplemath.com for a lesson on finding the prime factorization of numbers. Numerous examples are worked through step by step.
eBook
Math Planet

Math Planet: Factorization and Prime Numbers

For Students 6th - 8th
Gain an understanding of how to factor prime numbers by viewing examples and a video lesson.
Unit Plan
Sophia Learning

Sophia: Simplifying Radical Expressions: Lesson 5

For Students 9th - 10th Standards
This lesson will provide examples simplifying radical expression by applying the properties of square roots and prime factorization. It is 5 of 8 in the series titled "Simplifying Radical Expressions."
Lesson Plan
Alabama Learning Exchange

Alex: My Favorite Number

For Teachers 4th - 7th
The activity allows students to review many of the number theory concepts. Students will pick a composite number write verbal expressions about the number, find the factors, prime factorization, list multiples, draw a cartoon character...
Unknown Type
University of Waterloo (Canada)

Wired Math: Primes and Prime Factors [Pdf]

For Students 3rd - 8th Standards
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
Activity
Wyzant

Wyzant: Prime Factors Calculator

For Students 3rd - 8th Standards
Students input a number to be factored and the WyzAnt calculator does the rest. Limitations include the fact that numbers which are negative or which contain primes bigger than 541 cannot be handled.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Greatest Common Factor 2

For Students 9th - 10th Standards
Twenty-four problems present a variety of problems working with finding the greatest common factor and finding prime factorizations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of...
Lesson Plan
Google

Google for Education: Measuring Complexity of Function or Algorithm

For Teachers 9th - 10th Standards
In this lesson, students learn how to measure the complexity of the function or algorithm in a math problem and understand how this applies to real world situations.
Unit Plan
Cuemath

Cuemath: Square Root of 98

For Students 9th - 10th
In this mini-lesson, learn how to find the square root of 98 using various methods.
eBook
Math Planet

Math Planet: Monomials and Adding or Subtracting Polynomials

For Students 6th - 8th
Gain an understanding of how to add or subtract polynomials by viewing an example and a video lesson.
Handout
Quia

Ixl Learning: Least Common Multiple

For Students 5th - 6th Standards
Brush up on your math skills relating to the least common multiple then try some practice problems to test your understanding.